1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
31 * Copyright (c) 2011 Whamcloud, Inc.
34 * This file is part of Lustre, http://www.lustre.org/
35 * Lustre is a trademark of Sun Microsystems, Inc.
37 * lustre/fld/fld_index.c
39 * Author: WangDi <wangdi@clusterfs.com>
40 * Author: Yury Umanets <umka@clusterfs.com>
43 # define EXPORT_SYMTAB
45 #define DEBUG_SUBSYSTEM S_FLD
48 # include <libcfs/libcfs.h>
49 # include <linux/module.h>
50 # include <linux/jbd.h>
51 #else /* __KERNEL__ */
52 # include <liblustre.h>
56 #include <obd_class.h>
57 #include <lustre_ver.h>
58 #include <obd_support.h>
59 #include <lprocfs_status.h>
61 #include <dt_object.h>
62 #include <md_object.h>
63 #include <lustre_mdc.h>
64 #include <lustre_fid.h>
65 #include <lustre_fld.h>
66 #include "fld_internal.h"
68 const char fld_index_name[] = "fld";
70 static const struct lu_seq_range IGIF_FLD_RANGE = {
72 .lsr_end = FID_SEQ_IDIF,
74 .lsr_flags = LU_SEQ_RANGE_MDT
77 const struct dt_index_features fld_index_features = {
78 .dif_flags = DT_IND_UPDATE,
79 .dif_keysize_min = sizeof(seqno_t),
80 .dif_keysize_max = sizeof(seqno_t),
81 .dif_recsize_min = sizeof(struct lu_seq_range),
82 .dif_recsize_max = sizeof(struct lu_seq_range),
86 extern struct lu_context_key fld_thread_key;
88 static struct dt_key *fld_key(const struct lu_env *env,
91 struct fld_thread_info *info;
94 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
95 LASSERT(info != NULL);
97 info->fti_key = cpu_to_be64(seq);
98 RETURN((void *)&info->fti_key);
101 static struct dt_rec *fld_rec(const struct lu_env *env,
102 const struct lu_seq_range *range)
104 struct fld_thread_info *info;
105 struct lu_seq_range *rec;
108 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
109 LASSERT(info != NULL);
110 rec = &info->fti_rec;
112 range_cpu_to_be(rec, range);
116 struct thandle *fld_trans_create(struct lu_server_fld *fld,
117 const struct lu_env *env)
119 struct dt_device *dt_dev;
121 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
123 return dt_dev->dd_ops->dt_trans_create(env, dt_dev);
126 int fld_trans_start(struct lu_server_fld *fld,
127 const struct lu_env *env, struct thandle *th)
129 struct dt_device *dt_dev;
131 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
133 return dt_dev->dd_ops->dt_trans_start(env, dt_dev, th);
136 void fld_trans_stop(struct lu_server_fld *fld,
137 const struct lu_env *env, struct thandle* th)
139 struct dt_device *dt_dev;
141 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
142 dt_dev->dd_ops->dt_trans_stop(env, th);
145 int fld_declare_index_create(struct lu_server_fld *fld,
146 const struct lu_env *env,
147 const struct lu_seq_range *range,
150 struct dt_object *dt_obj = fld->lsf_obj;
156 start = range->lsr_start;
157 LASSERT(range_is_sane(range));
159 rc = dt_obj->do_index_ops->dio_declare_insert(env, dt_obj,
161 fld_key(env, start), th);
166 * insert range in fld store.
168 * \param range range to be inserted
169 * \param th transaction for this operation as it could compound
176 int fld_index_create(struct lu_server_fld *fld,
177 const struct lu_env *env,
178 const struct lu_seq_range *range,
181 struct dt_object *dt_obj = fld->lsf_obj;
187 start = range->lsr_start;
188 LASSERT(range_is_sane(range));
190 rc = dt_obj->do_index_ops->dio_insert(env, dt_obj,
195 CDEBUG(D_INFO, "%s: insert given range : "DRANGE" rc = %d\n",
196 fld->lsf_name, PRANGE(range), rc);
201 * delete range in fld store.
203 * \param range range to be deleted
204 * \param th transaction
210 int fld_index_delete(struct lu_server_fld *fld,
211 const struct lu_env *env,
212 struct lu_seq_range *range,
215 struct dt_object *dt_obj = fld->lsf_obj;
216 seqno_t seq = range->lsr_start;
221 rc = dt_obj->do_index_ops->dio_delete(env, dt_obj, fld_key(env, seq),
224 CDEBUG(D_INFO, "%s: delete given range : "DRANGE" rc = %d\n",
225 fld->lsf_name, PRANGE(range), rc);
231 * lookup range for a seq passed. note here we only care about the start/end,
232 * caller should handle the attached location data (flags, index).
234 * \param seq seq for lookup.
235 * \param range result of lookup.
237 * \retval 0 found, \a range is the matched range;
238 * \retval -ENOENT not found, \a range is the left-side range;
239 * \retval -ve other error;
242 int fld_index_lookup(struct lu_server_fld *fld,
243 const struct lu_env *env,
245 struct lu_seq_range *range)
247 struct dt_object *dt_obj = fld->lsf_obj;
248 struct lu_seq_range *fld_rec;
249 struct dt_key *key = fld_key(env, seq);
250 struct fld_thread_info *info;
255 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
256 fld_rec = &info->fti_rec;
258 rc = dt_obj->do_index_ops->dio_lookup(env, dt_obj,
259 (struct dt_rec*) fld_rec,
263 range_be_to_cpu(fld_rec, fld_rec);
265 if (range_within(range, seq))
271 CDEBUG(D_INFO, "%s: lookup seq = "LPX64" range : "DRANGE" rc = %d\n",
272 fld->lsf_name, seq, PRANGE(range), rc);
277 static int fld_insert_igif_fld(struct lu_server_fld *fld,
278 const struct lu_env *env)
284 /* FLD_TXN_INDEX_INSERT_CREDITS */
285 th = fld_trans_create(fld, env);
288 rc = fld_declare_index_create(fld, env, &IGIF_FLD_RANGE, th);
290 fld_trans_stop(fld, env, th);
293 rc = fld_trans_start(fld, env, th);
295 fld_trans_stop(fld, env, th);
299 rc = fld_index_create(fld, env, &IGIF_FLD_RANGE, th);
300 fld_trans_stop(fld, env, th);
306 int fld_index_init(struct lu_server_fld *fld,
307 const struct lu_env *env,
308 struct dt_device *dt)
310 struct dt_object *dt_obj;
315 dt_obj = dt_store_open(env, dt, "", fld_index_name, &fid);
316 if (!IS_ERR(dt_obj)) {
317 fld->lsf_obj = dt_obj;
318 rc = dt_obj->do_ops->do_index_try(env, dt_obj,
319 &fld_index_features);
321 LASSERT(dt_obj->do_index_ops != NULL);
322 rc = fld_insert_igif_fld(fld, env);
325 CERROR("insert igif in fld! = %d\n", rc);
326 lu_object_put(env, &dt_obj->do_lu);
330 CERROR("%s: File \"%s\" is not an index!\n",
331 fld->lsf_name, fld_index_name);
335 CERROR("%s: Can't find \"%s\" obj %d\n",
336 fld->lsf_name, fld_index_name, (int)PTR_ERR(dt_obj));
337 rc = PTR_ERR(dt_obj);
343 void fld_index_fini(struct lu_server_fld *fld,
344 const struct lu_env *env)
347 if (fld->lsf_obj != NULL) {
348 if (!IS_ERR(fld->lsf_obj))
349 lu_object_put(env, &fld->lsf_obj->do_lu);